The quantitation of how much time constitutes short and recent varies by disease and by context, but the core denotation of acute is always qualitatively in contrast with chronic, which denotes long-lasting disease (for example, in acute leukemia and chronic leukemia).
View full size image. Thomas Edison is usually credited with the invention of the light bulb, but the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology.
But the carbon-arc lamp was so bright and required so much power that it was never widely used and was rapidly superseded by the simultaneous invention of the carbon-filament bulb by Thomas Edison and Joseph Swan in 1879.